Found a useful secret in WKO (thanks to Joe Friel blog
(see comments for instructions)
on how to get WKO to show a measure of cardiac drift. I went back to the cardiac drift test I did a bit earlier and is showed for 30 minutes at 200W my drift is 2.8%.
In other tests 30 mins at 230W showed a drift of 4.6% and 90 mins of varying 160-185W actually showed a negative 2.6% drift.
Interested in this new measure I went back to my time trials last year these showed
H10/3 10mile flat TT (first ever) 325W (NP 328) drift -1.39%
H10/3 10mile flat TT (second ever) 328W (NP331) drift 9.2%
These show in figures what happened in practice. First time out I took things conservatively going out then put power on coming back but still had a bit to spare.
Second time out I pushed too hard in the first half, averaging 337W(NP345) but got knackered. This shows in a drift of 13%. So had to peg back on return averaging only 317W.
H10/3A (rolling with headwind) 10 mile TT 324W(NP 331) drift 10.2% - again got pacing wrong as first ride on the course and did not leave enough for headwind coming back.
HC248 (hilly 24km TT) 304W(NP313) drift 4.6% - first time on an unfamiliar course, so took things conservatively
HCC247 (flattish 25mile TT) 280W(NP 284) drift 3.7% - first (so far only) 25 mile ride which I did at last minute. So again rode conservatively.
So overall interesting how drift measure ties up with how I rode. I guess one measure of fitness is being able to push up your power while keeping drift stable. Will be interesting to see what rides in 2008 will show.
Wi
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